lightnvm: pblk: stop taking the free lock in in pblk_lines_free

pblk_line_meta_free might sleep (it can end up calling vfree, depending
on how we allocate lba lists), and this can lead to a BUG()
if we wake up on a different cpu and release the lock.

As there is no point of grabbing the free lock when pblk has shut down,
remove the lock.

Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>

diff --git a/drivers/lightnvm/pblk-init.c b/drivers/lightnvm/pblk-init.c
index f9a3e47b6a93410e6d129aa8eb8458f89143e586..eb0135c7780518a9d07d88d556af91daa3cebac5 100644 (file)
--- a/drivers/lightnvm/pblk-init.c
+++ b/drivers/lightnvm/pblk-init.c
@@ -584,14 +584,12 @@ static void pblk_lines_free(struct pblk *pblk)
        struct pblk_line *line;
        int i;
 
-       spin_lock(&l_mg->free_lock);
        for (i = 0; i < l_mg->nr_lines; i++) {
                line = &pblk->lines[i];
 
                pblk_line_free(line);
                pblk_line_meta_free(l_mg, line);
        }
-       spin_unlock(&l_mg->free_lock);
 
        pblk_line_mg_free(pblk);